Fuel Delivery System - Intake Manifold

Group 3.265 - MANIFOLD, Engine Intake

Above are Chevrolet replacement PART NUMBERS for intake manifolds and not the numbers cast on the manifold itself. Below are samples of intake manifolds with casting number and associated part number

Intake Manifold Month Date Codes

283 and 327 V8 Engines

Intake manifold for Rochester 4GC type carburetor, 283/220hp engine.
 - casting #3882858/part #3888885

Intake manifold for Holley, 327/275hp engine w/o Air Injection Reactor and accepts either the Carter or Holley carburetor.
 - casting #3872783/part #3888886

Underside of casting #3872783


Casting #3872783 with date of E206 (May 20, 1966)

Intake manifold for Rochester Quadra-Jet, 327/275hp engine w/Air Injection Reactor.
 - casting #3875954/part #3931575

Intake manifold for Holley, 327/350hp introduced March, 1966.
 - casting #3890490/part #3893594

Three versions of this manifold have been found - all with casting #3890490 and all with differences on the bottom side. This intake was used on 1966 and 1967 Chevelles, Chevy IIs and Corvettes. Casting date is, unfortunately, located under the splash shield.

While not an integral part of the fuel system, the oil fill tube on the L79 was chrome in place of the standard black finish and carries part number 3889316 where the black finish unit carries part number 3881858 for the non closed positive ventilation system and 3889311 for the closed positive ventilation system.

Engine left brackets were installed at the engine assembly plant to aid in the installation of the engine at final assembly time. The pair shown here are for the 283/327 engines. The single-bolt bracket bolted to the rearward intake bolt on the passenger side while the double-bolt bracket bolted to the front two bolts of the intake on the driver side.

396 V8 Engines

Intake manifold for Rochester Quadra-Jet, 396/325hp engine w/Air Injection Reactor.
 - casting #3883948/part #3957996
 - casting date of F176 - June 17, 1966.

Intake manifold for Holley, 396/360hp engine
 - casting #3866948/part #3876818

Some resources indicate this intake was also used on 396/325hp engines when equipped with a Holley carburetor although the Chevrolet parts book does NOT indicate this. But Holley carburetors were installed on some 396/325hp engines and the Chevrolet parts book does not show a service replacement for this combination.

 - casting date of J295 - October 29, 1965.

- casting number 3866948 and casting mold identification GM2


Note integral oil splash shield.